—________ will your brother come back?—I’m not sure. Maybe in a week.A. When B. How C. Whether
I have great fun ________ and ________ English.
I think natural wonders are more interesting than man-made ________.
Last night, a thief climbed into our house ________ the window.
When I heard the story, I couldn’t help ________________.
Our hometown ________________ a lot in the past ten years.